Sink



FIG. 1 is a top plan view of a sink showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side being amirror image of the side shown; and

FIG. 4 is a cross sectional view taken on line 4--4 of FIG. 2.

The ornamental design for a sink, substantially as shown and described.